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Finding the Fourth Proportional to 43,480.65, 65,163.12 and 28,468.74

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Solution

The fourth proportional to 43,480.65, 65,163.12 and 28,468.74 is: 42,665.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,480.65 : 65,163.12 = 28,468.74 : x
  2. Step 2: Convert to fraction form
    43,480.65/65,163.12 = 28,468.74/x
  3. Step 3: Cross multiply
    43,480.65x = 65,163.12 × 28,468.74
  4. Step 4: Simplify right side
    43,480.65x = 1,855,111,920.87
  5. Step 5: Solve for x
    x = 1,855,111,920.87/43,480.65
  6. Step 6: Final answer
    x = 42,665.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.